08 Nov Chunfeng Hao
Chunfeng Hao Ph.D, Senior Engineer at China Institute of Water Resources and Hydropower Research, member of IAHS, IAHR and EGU, working on hydro-meteorological coupling research, eco-environmental flow assessment and water resources management, supported by National Key Research & Development Program of China, National Natural Science Foundation of China, etc.
Holistic Analysis of Instream Eco-Environmental Flow for the Weihe River in China
To restore the ecosystem of rivers and develop the basin-wide ecological civilization, it is significant to recognize by mechanism, scientifically identify and effectively guarantee the instream eco-environmental flow. In the research and management of instream eco-environmental flow, multiple problems urgently need to be solved, including the recognition of the natural eco-hydrological base under both natural and social impacts, the identification of eco-environmental restoration targets and eco-environmental flow indicators and the development of ecologically-oriented integrated regulation schemes for river basins and projects. In this paper, the method of Holistic Eco-environmental Flow Assessment in Semi-arid and Semi-humid Areas (HEFASS) of great theoretical significance and practical value has been put forward, which figured out three levels of eco-environmental flow indicators, fully satisfied level, critical level and minimum level, for the 24 sections of the Weihe River mainstream and 30 sections of 18 key tributaries. The Weihe River, the largest tributary of the Yellow River, represents the most intense contradiction between human and ecological water demands in the semi-arid and semi-humid areas. The results have been adopted and put into practice in the dry-season water resources regulation of the Weihe River by Shaanxi Provincial Department of Water Resources and Shaanxi Provincial Authority for River and Reservoir Management, as well as cities along the Weihe River. It’s meaningful for the balance of human water use and riverine eco-environmental water demand in water-stressed regions.